JPH0618957U - Seal inspection device for PTP - Google Patents

Abstract

(57) [Abstract] [Purpose] The present invention can be installed in an existing blister pack device or on a conveyor, and can be used as a PVC sheet or the like which constitutes a PTP sheet without requiring special personnel. Inspects whether the aluminum film is sufficiently heat-sealed at one time and accurately at high speed. A PTP sheet 4 to be inspected is illuminated from above obliquely by each illumination device 1, and the PTP sheet 4 illuminated by each illumination device 1 by a television camera 2
The TP sheet 4 is photographed from directly above, the image photographed by the television camera 2 is processed by the image processing device 3, and when the PTP sheet 4 has a defective seal portion, this is detected.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a PTP seal inspection device for inspecting whether a PVC sheet or the like constituting a PTP sheet and an aluminum film are sufficiently heat-sealed.

[0002]

[Prior art]

 When making a PTP sheet, an inspector visually inspects the PTP sheet that has been punched and transported on the transport conveyor, and the PVC sheet and other components that make up the PTP sheet and the aluminum film are sufficiently heat-sealed. I'm trying to inspect it.

[0003]

[Problems to be solved by the device]

 However, in the above-described conventional sealing failure inspection method, the inspector visually inspects whether the PVC sheet or the like constituting the PTP sheet and the aluminum film are sufficiently heat-sealed. Therefore, it was difficult to increase the accuracy of the inspection, and there was the problem that skilled inspectors had to be secured.

In addition, although the inspection method of visually inspecting the defective seal can detect a large-scale defective seal, there is a problem that it is difficult to find the defective seal when the area of the defective seal is small. .

In view of the above circumstances, the present invention can be installed in an existing blister pack device or on a conveyer conveyor, and a PVC sheet or the like which constitutes a PTP sheet without requiring special personnel. It is an object of the present invention to provide a PTP seal inspection device capable of inspecting whether or not an aluminum film is sufficiently heat-sealed at one time and at high speed and accurately.

[0006]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, a PTP seal inspection apparatus according to the present invention includes an illumination device for illuminating a PTP sheet to be inspected obliquely from above, and a PTP sheet illuminated by the illumination device. It is characterized in that it is provided with a photographing device for photographing from above and an image processing device for processing an image photographed by the photographing device and detecting when there is a defective seal portion on the PTP sheet.

[0007]

[Action]

 In the above configuration, the PTP sheet to be inspected is illuminated by the lighting device from an obliquely upper side, and the PTP sheet illuminated by the lighting device is photographed from directly above by the photographing device, and the PTP sheet is photographed by the image processing device. When the image captured by the image capturing device is processed and the PTP sheet has a defective seal portion, this is detected.

[0008]

【Example】

 FIG. 1 is a front view showing an embodiment of a PTP seal inspection device according to the present invention.

The PTP seal inspection device shown in this figure is provided with two lighting devices 1 provided inside the blister pack device or above the conveyor, a television camera 2 and an image processing device 3, and While the PTP sheet 4 being conveyed is obliquely illuminated by the lighting device 1 from above, the television camera 2 photographs the PTP sheet 4 from above, and the image processing device 3 obtains the image signal obtained by this photographing operation. Whether the packaging material 5 such as the PVC sheet and the aluminum film 6 which are processed to constitute the PTP sheet 4 and the aluminum film 6 are sufficiently heat-sealed at one time and accurately at high speed.

As shown in FIG. 2, each illuminating device 1 has an illuminating case 8 obliquely arranged above a conveying conveyor for conveying the PTP sheet 4, and a rod-like case arranged in the illuminating case 8. A light source 9 and a reflector 10 for reflecting the light obtained by the light source 9 are provided, and the light obtained by the light source 9 is reflected by the reflector 10 and the reflected light from the reflector 10 and the light source 9 are provided. The direct light from the PTP sheet 4 is emitted from the opening 11 of the illumination case 8 to illuminate the PTP sheet 4 conveyed on the conveyer from diagonally above.

Further, the television camera 2 is arranged above a conveyer conveys the PTP sheet 4, photographs the PTP sheet 4 illuminated by each of the illumination devices 1 from directly above, and performs the photographing operation. The image signal obtained by the above is supplied to the image processing device 3.

In this case, since the PTP sheet 4 is illuminated from above obliquely by the respective lighting devices 1, the packaging material 5 such as a PVC sheet and the aluminum film 6 which constitute the PTP sheet 4 are separated from each other. If it is sufficiently heat-sealed, since the aluminum film 6 is not meshed to have a mirror surface, the light from each of the lighting devices 1 is diffusely reflected and enters the television camera 2, and the PVC sheet or the like. If the packaging material 5 and the aluminum film 6 are not sufficiently heat-sealed, since the aluminum film 6 has a mirror-like state that is the state before the mesh processing, the light from each of the lighting devices 1 is not reflected. The light is reflected specularly above and is emitted obliquely upward and does not enter the television camera 2.

The image processing device 3 takes in the image signal output from the television camera 2, converts the image signal into a density difference, averages it with an average value filter, and obtains an image obtained by this averaging process. The signal is binarized by a preset threshold value to generate a binarized image, and if there is a defective portion, the area thereof is calculated to detect the defective portion.

In this case, a part of the packaging material 5 such as a PVC sheet constituting the PTP sheet 4 and the aluminum film 6 is not sufficiently heat-sealed, and is indicated by an image signal output from the television camera 2. The image shown in Fig. 3 (a) is the image shown in Fig. 3 (a), the minimum density value of the defective seal is the value shown in Fig. 3 (b), and the mesh minimum density value is the value shown in Fig. 3 (c). When the image signal output from the TV camera 2 is converted into the density difference and then not averaged by the average value filter, the image of the density difference shown in FIG. When binarized, the binarized image shown in FIG. 4 (b) is obtained, and when the image of the density difference is binarized at 76%, the binarized image shown in FIG. 4 (c) is obtained. .

On the other hand, the image obtained by photographing the PTP sheet 4 with the television camera 2 is an image as shown in FIG. 5A, and the maximum density value of the sheet portion is shown in FIG. 5B. 6), the minimum density value of the defective seal portion becomes the value shown in FIG. 6 (a), and the mesh minimum density value becomes the value shown in FIG. 6 (b). When the image signal output from is converted into a density difference and then averaged by an average value filter, the original image shown in FIG. 8), the binarized image shown in FIG. 7 (b) is obtained, and the original image is averaged by an average value filter, and then as shown in FIG. 8 (a). When binarized at 76%, the binarized image shown in FIG. Be done.

It will be apparent by comparing the binarized images shown in FIGS. 7B and 8B with the binarized images shown in FIGS. 4B and 4C. In addition, by averaging with an average value filter, it is possible to remove the influence of the mesh portion and emphasize and extract only the defective portion.

In this way, in this embodiment, the PTP sheet 4 which is being conveyed is illuminated by the lighting devices 1 from diagonally above, and the PTP sheet 4 is photographed from above by the television camera 2. Whether the image signal obtained by this photographing operation is processed by the image processing device 3 so that the packaging material 5 such as a PVC sheet and the aluminum film 6 which compose the PTP sheet 4 are sufficiently heat-sealed. Since it was inspected, it can be installed in the existing blister pack device, and without the need for special personnel, the packaging material 5 such as PVC sheet and the aluminum film that compose the PTP sheet 4 can be installed. It is possible to inspect at once, at high speed and accurately whether or not 6 and 7 are sufficiently heat-sealed.

[0018]

[Effect of device]

 As described above, according to the present invention, a PVC sheet or the like that can be installed in an existing blister pack device or on a transporting conveyor and that constitutes a PTP sheet without requiring special personnel It is possible to inspect at once, at high speed and accurately whether or not the aluminum film and the aluminum film are sufficiently heat-sealed.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of a PTP seal inspection device according to the present invention.

FIG. 2 is a partially cut side view showing a detailed configuration example of the illumination device shown in FIG.

FIG. 3 is a schematic diagram showing a processing example of the PTP seal inspection apparatus shown in FIG.

FIG. 4 is a schematic diagram showing a processing example of the PTP seal inspection apparatus shown in FIG.

5 is a schematic diagram showing a processing example of the PTP seal inspection device shown in FIG. 1. FIG.

FIG. 6 is a schematic view showing a processing example of the PTP seal inspection apparatus shown in FIG.

FIG. 7 is a schematic diagram showing a processing example of the PTP seal inspection apparatus shown in FIG.

FIG. 8 is a schematic diagram showing a processing example of the PTP seal inspection apparatus shown in FIG.

[Explanation of symbols]

 1 Lighting device 2 Television camera (photographing device) 3 Image processing device 4 PTP sheet 5 Packaging material such as PVC sheet 6 Aluminum film

Claims (1)

[Scope of utility model registration request] 1. An illuminating device that illuminates a PTP sheet to be inspected from obliquely above, a photographing device that photographs the PTP sheet illuminated by this illuminating device from directly above, and an image photographed by this photographing device. To process the P
An image processing device for detecting a defective seal portion on a TP sheet, and a seal inspection device for a PTP.